22222525 has 24 divisors (see below), whose sum is σ = 30013704. Its totient is φ = 16224000.

The previous prime is 22222517. The next prime is 22222537. The reversal of 22222525 is 52522222.

It can be written as a sum of positive squares in 12 ways, for example, as 151321 + 22071204 = 389^2 + 4698^2 .

It is not a de Polignac number, because 22222525 - 2³ = 22222517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22222496 and 22222505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32487 + ... + 33163.

It is an arithmetic number, because the mean of its divisors is an integer number (1250571).

Almost surely, 2^22222525 is an apocalyptic number.

22222525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22222525 is a deficient number, since it is larger than the sum of its proper divisors (7791179).

22222525 is a wasteful number, since it uses less digits than its factorization.

22222525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 796 counting only the distinct ones).

The product of its digits is 1600, while the sum is 22.

The square root of 22222525 is about 4714.0773222339. The cubic root of 22222525 is about 281.1454986248.

Adding to 22222525 its reverse (52522222), we get a palindrome (74744747).

The spelling of 22222525 in words is "twenty-two million, two hundred twenty-two thousand, five hundred twenty-five".